Fungicidal mixtures

Abstract

The invention relates to a novel fungicidal composition comprising a fungicidally acceptable carrier and/or surface active agent together with, and synergistically effective amounts of (a) at least one benzophenone of formula I wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , m and n have the meaning given; at least one fungicidal active ingredient selected from the following groups (A), (B), (C), (D) and (E): (A) an ergosterol biosynthesis inhibitor; (B) a strobilurine derivative, (C) a melanin biosynthesis inhibitor; (D) a compound selected from the group consisting of acibenzolar, benomyl, captan, carboxin, chlorothalonil, copper, cyprodinil, dinocap, dithianon, dimethomorph, dodine, ethirimol, famoxadone, fenpiclonil, fluazinam, mancozeb, metalaxyl, pyrifenox, sulfur, vinclozolin and (E) an azolopyrimidine of formula II in which R 8 , R 9 , R 10 , R 11 , A, L and p have the meaning given; and to a method of controlling the growth of phytopathogenic fungi at a locus which comprises applying synergistically effective amounts of (a) at least one benzophenones of formula I and (b) at least one fungicidal active ingredient selected from the groups (A), (B), (C), (D) and (E) to the locus.

What is claimed is:  
     
       1. A fungicidal composition comprising from about 0.1 to 99.9% by weight of synergistically effective amounts of 
       (a) at least one benzophenone of formula IA.                    
        wherein  
       R 1  is a halogen atom, a methyl, trifluoromethyl, methoxy or hydroxy group,  
       R 2  is a halogen atom or a methyl group,  
       R 3  is a halogen atom, an optionally substituted alkyl or alkoxy group or a nitro group;  
       n is 0 or 1;  
       R 4  is a halogen atom, a cyano, carboxy, hydroxy or nitro group or an optionally substituted alkyl, alkoxy, alkenyl, alkylthio, alkylsulphinyl, alkylsulphonyl or amino group;  
       R 5  is an optionally substituted alkyl group;  
       R 6  is a halogen atom or a nitro group, an optionally substituted alkyl, alkoxy, alkenyloxy, alkynyloxy, alkylthio, cycloalkyl, cycloalkoxy, aryloxy group; and  
       R 7  is a halogen atom, an optionally substituted alkyl, alkenyl, alkynyl, alkoxy, alkenyloxy, alkynyloxy, cycloalkyl, cycloalkoxy group; and  
       (b) at least one fungicidally active ingredient (A) selected from the group consisting of fenarimol, fenpropimorph, fenpropidine, spiroxamine, triforine, and azole compounds of formulae IIIA and IIIB                    
        wherein  
       E 1  is a moiety (a), (b), (c), (d) or (e)                    
       E 2  is a moiety of formula —N(X 8 )—(CH 2 ) s —O—;  
       X 1  is an alkyl or an optionally substituted phenyl group;  
       X 2  and X 3  are, independently from one another, a hydrogen atom or an alkyl group;  
       X 4  is an alkyl or cyclopropylalkyl group;  
       X 5  is a hydroxy or cyano group;  
       X 6  is an optionally substituted phenyl group;  
       X 7  is a halogen atom;  
       q is 1, 2 or 3;  
       r is 0 or 2;  
       X 8  is a hydrogen atom or an alkyl group, and  
       s is an integer from 1 to 6;  
       together with from about 99.9 to 0.1% by weight of a fungicidally acceptable carrier and/or surface active agent. 
     
     
       2. The composition defined in  claim 1 , wherein the benzophenone of formula IA is selected from the group consisting of 
       6′-butoxy-2,6-dichloro-4′,5′-dimethoxy-2′-methylbenzophenone;  
       2,6-dichloro-4′,5′-dimethoxy-6′-(2-fluorobenzyloxy)-2′-methylbenzophenone;  
       6′-benzyloxy-4′,5′-dimethoxy-2,6-dimethyl-2′-methylbenzophenone;  
       5-bromo-2′,6-dimethyl-2,4′,5′,6′-tetramethoxybenzophenone; and  
       2,6-dichloro-2′-methyl-4′,5′,6′-trimethoxybenzophenone.  
     
     
       3. The composition defined in  claim 1 , wherein the benzophenone of formula IA is 5-bromo-2′,6-dimethyl-2,4′,5′, 6′-tetramethoxybenzophenone. 
     
     
       4. The composition defined in  claim 1 , wherein the at least one fungicidally active ingredient (A) is selected from the group consisting of fenarimol, fenpropimorph, fenpropidine, spiroxamine, triforine, cyproconazole, epoxiconazole, flusilazole, metconazole, myclobutanil, penconazole, prochloraz, propiconazole, tebuconazole, triadimefon and tridimenol. 
     
     
       5. The composition defined in  claim 4 , wherein the benzophenone of formula IA is selected from the group consisting of 
       6′-butoxy-2,6-dichloro-4′,5′-dimethoxy-2′-methylbenzophenone;  
       2,6-dichloro-4′,5′-dimethoxy-6′-(2-fluorobenzyloxy)-2′-methylbenzophenone;  
       6′-benzyloxy-4′,5′-dimethoxy-2,6-dimethyl-2′-methylbenzophenone;  
       5-bromo-2′,6-dimethyl-2,4′,5′,6′-tetramethoxybenzophenone; and  
       2,6-dichloro-2′-methyl-4′,5′,6′-trimethoxybenzophenone.  
     
     
       6. The composition defined in  claim 4 , wherein the benzophenone of formula IA is 5-bromo-2′,6-dimethyl-2,4′,5′, 6′-tetramethoxybenzophenone. 
     
     
       7. The composition defined in  claim 1 , wherein the at least one fungicidally active ingredient (A) is selected from the group consisting of fenarimoll, fenpropimorph, fenpropidine, spiroxamine, triforine, epoxiconazole, metconazole, myclobutanil and prochloraz. 
     
     
       8. The composition defined in  claim 7 , wherein the benzophenone of formula IA is selected from the group consisting of 
       6′-butoxy-2,6-dichloro-4′,5′-dimethoxy-2′-methylbenzophenone; 2,6-dichloro-4′,5′-dimethoxy-6′-(2-fluorobenzyloxy)-2′-methylbenzophenone;  
       6′-benzyloxy-4′,5′-dimethoxy-2,6-dimethyl-2′-methylbenzophenone;  
       5-bromo-2′,6-dimethyl-2,4′,5′,6′-tetramethoxybenzophenone; and  
       2,6-dichloro-2′-methyl-4′,5′,6′-trimethoxybenzophenone.  
     
     
       9. The composition defined in  claim 7 , wherein the benzophenone of formula IA is 5-bromo-2′,6-dimethyl-2,4′, 5═, 6′-tetramethoxybenzophenone. 
     
     
       10. The composition defined in  claim 1 , wherein the benzophenone of formula IA and the at least one fungicidally active ingredient (A) are present in a weight ratio of from 10:1 to 1:10. 
     
     
       11. The composition defined in  claim 1 , which additionally comprises a strobilurine compound. 
     
     
       12. The composition defined in  claim 11 , wherein the benzophenone of formula IA is selected from the group consisting of 
       6′-butoxy-2,6-dichloro-4′,5′-dimethoxy-2′-methylbenzophenone;  
       2,6-dichloro-4′,5′-dimethoxy-6′-(2-fluorobenzyloxy)-2′-methylbenzophenone;  
       6′-benzyloxy-4′,5′-dimethoxy-2,6-dimethyl-2, -methylbenzophenone;  
       5-bromo-2′,6-dimethyl-2,4′,5′,6′-tetramethoxybenzophenone; and  
       2,6-dichloro-2′-methyl-4′,5′,6′-trimethoxybenzophenone.  
     
     
       13. The composition defined in  claim 11 , wherein the benzophenone of formula IA is 5-bromo-2′,6-dimethyl-2,4′,5′, 6′-tetramethoxybenzophenone. 
     
     
       14. The composition defined in  claim 11 , wherein the at least one fungicidally active ingredient (A) is selected from the group consisting of fenarimol, fenpropimorph, fenpropidine, spiroxamine, triforine, cyproconazole, epoxiconazole, flusilazoc, metconazole, myclobutanil, penconazole; prochloraz, propiconazole, tebuconazole, triadimefon and tridimenol. 
     
     
       15. The composition defined in  claim 11 , wherein the at least one fungicidally active ingredient (A) is selected from the group consisting of fenarimol, fenpropimorph, fenpropidine, spiroxamine, triforine, epoxiconazole, metconazole, myclobutanil and prochloraz. 
     
     
       16. The composition defined in  claim 11 , wherein the benzophenone of formula IA and the at least one fungicidally active ingredient (A) are present in a weight ratio of from 10:1 to 1:10. 
     
     
       17. A method of controlling the growth of fungi at a locus which comprises applying the composition defined in  claim 1 , at a dose rate of from 0.01 to 10 kg/ha to the locus.